LinuxQuestions.org - [SOLVED] Login incorrect via getty

Hi all,
I try to setup a small Debian system running on command line.
Remote access shall be possible via ssh (for now also telnet) and a serial connected minicom via getty.
I need the serial access as fallback in case the network is down.

As long as the package adduser is not installed, I can login as root via telnet and getty without problem. But from the moment "adduser" is installed with apt-get, the serial root login always fails after entering the right password with the message "Login incorrect". Even de-installing "adduser", or using a brand new "adduser test" user, don't help anymore...
When installing and using SSH it allows to login successfully, like telnet.

BTW: A dangerous behavior I observed with telnet:
When I opening the connection via telnet, I'm immediately logged in as root - without asking for a password! I set a password with passwd which also is requested by SSH and getty (before the adduser installation) but not by telnet?!?!?

The /var/log/messages adds a line if login with su, but nothing when fails with getty

Here is my inittab:

Code:

# /etc/inittab: init(8) configuration.      

# inittab,v 1.1 2006-07-27 08:58:03 lothar Exp



# The default runlevel.

id:2:initdefault:      



# Boot-time system configuration/initialization script.

# This is run first except when booting in emergency (-b) mode.

si::sysinit:/etc/init.d/rcS                                    



# What to do in single-user mode.

~~:S:wait:/bin/sh                



# /etc/init.d executes the S and K scripts upon change of runlevel.                                        



l0:0:wait:/etc/init.d/rc 0

l1:1:wait:/etc/init.d/rc 1

l2:2:wait:/etc/init.d/rc 2

l3:3:wait:/etc/init.d/rc 3

l4:4:wait:/etc/init.d/rc 4

l5:5:wait:/etc/init.d/rc 5

l6:6:wait:/etc/init.d/rc 6

# Normally not reached, but fallthrough in case of emergency.

z6:6:respawn:/bin/sh                                        



# What to do when CTRL-ALT-DEL is pressed.

ca:12345:ctrlaltdel:/sbin/shutdown -t1 now



# Example how to put a getty on a serial line (for a terminal)

s0:23:respawn:/sbin/getty -L ttymxc0 115200 linux

s1:23:respawn:/sbin/getty -L ttymxc1 38400 linux

s2:23:respawn:/sbin/getty -L ttymxc2 38400 linux



# Run getty on framebuffer device

F0:23:respawn:/sbin/getty -L tty0 38400 linux

and here my /etc/pam.d/common-password (because I have the gut feeling it have something to do with PAM)

Code:

password        [success=1 default=ignore]      pam_unix.so obscure sha512

password        requisite                      pam_deny.so

password        required                        pam_permit.so

The /etc/securetty also consist the used /dev/ttymxc0 :

Code:

console

ttyS0

ttyS1

ttyS2

ttymxc0

ttymxc1

ttymxc2

Here a part of the /etc/login.defs hoping this is enough:

Code:

                                                        

TTYGROUP        tty                                                    

TTYPERM        0600

It is an Emdebian Grip Squeeze running on an armel ARM9 embedded controller.

any hints where I could search for this problem???